Using subject lines like "Verify your active status" can lift open rates by 27-31% for contacts who haven't engaged in over a year. While effective for reactivation, this slightly gimmicky approach will also annoy some users, leading to a higher-than-usual unsubscribe rate and negative replies, which requires 'thick skin'.

Don't fear unsubscribes after trying a new tactic like an emoji. A high unsubscribe rate often means your email finally stood out to a long-disengaged segment. This prompted them to take action and clean themselves from your list, which is a positive outcome for list health.

Email providers track engagement. When many subscribers ignore your emails, algorithms assume your content is low-priority, filtering it to spam or promotions for everyone—even your most loyal followers. A clean list improves deliverability for your entire audience.

Email providers prioritize senders with high engagement. Sending at least five emails per month generates more opens and clicks, signaling credibility. This counterintuitively leads to higher average open rates and better inbox placement, contrary to the common fear of over-sending.

Contrary to the fear of over-sending, emailing at least five times per month improves deliverability. Email providers view consistent recipient engagement (opens, clicks) as a sign of a credible sender, leading to better inbox placement and significantly higher open rates.

Getting a subscriber to reply to a marketing email is the number one signal to inbox providers that your content is valued. This single action dramatically improves future email deliverability and keeps your campaigns in the primary inbox.

A sudden increase in unsubscribes after a marketing change isn't necessarily a failure. It often means you've successfully grabbed the attention of disengaged subscribers who then self-select out because the content is no longer relevant, which is a healthy outcome for your list.

Prompting subscribers with simple, non-work-related questions (e.g., "What's your favorite holiday cookie?") encourages replies. This builds a conversational relationship, improves engagement signals, and positively impacts email deliverability and open rates.

The holiday season sees a massive spike in email unsubscribes. This isn't due to your marketing efforts, but because people are trying to "clean up" their inboxes for the new year. Marketers should anticipate this trend and not misinterpret it as a sign of poor campaign performance or reduce email frequency.